Our augmentation pipeline consists of crop, rotation, horizontal flip, vertical flip, padding, aspect ratio change, perspective transform, overlay onto background image, overlay of text and emoji, changes in brightness, saturation and grayscale, random erasing [1]}, blur, color palette with dithering, JPEG encoding, edge enhance, pixelization, and pixel shuffling.
The order to apply augmentation is continuously and, randomly shuffled to generate more diversified examples.
These augmentations were selected based on how the dataset for ISC21 was created.
Parameters of the augmentations were manually set to the range, as close as possible to the actual copied examples by eye-checking.
Examples of images processed by our data augmentation pipeline are shown in Figure REF .
